A booklet listing then-current Intertype Company (division of Harris-Intertype Corporation) linecasting matrices, with matrix identification information. This undated publication would appear to postdate the 1958 edition reprinted at http://archive.org/details/IntertypeFontNumbers1958, but probably predates 1963 (as it still uses city zone codes, not ZIP codes).
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This work was published in the US without copyright notice at a time when such notice was required to secure copyright. It therefore passed into the public domain upon initial publication. This digital reprint remains in the public domain.